Anchoring means for tire fabrics.



B. L. S'TOWE. ANCHORING MEANS FOR TIRE FABRICS.

APPLICATION FILED JULY 25, I916.

Patented May 29, 1917.

Ben '4 HIS ATTORNEY mlzmmm' L. s'rown. or JERSEY ci'TY NEW JERSEY, assienon To MoRGAN awnisiitr,

A CORPORATION or MICHIGAN. a r

ANGHORING mnsnsroa TIRE nannies.

for Tire Fabrics, of which the following is a full, clear, and exact description.

This invention relates more particularly to what are known as cord tires, that is,

tires in which the yarn, threads or cords are.

located in the carcass of the tire so that they extend from one anchoring ring to the other along parallel lines and are not positively bound together transversely except in so far as the rubber *serves such purpose. The object of my invention is to provide a new and lmproved means'for anchoring the I ends of the cords at the bead core or wire,

which anchoring means may be easily attached to the cords during the process of manufacture and positively retain the cords in position. It is also the object ofmy in vention to provide such anchoring means that may be quickly and easily attached to the cords as they are successively placed in position about the core on which the carcass is formed. I

Briefly stated, my'invention comprises the use of a helical coil of steel wire or other metal which is located within the bead portions of the tire, around which the threads of the outer covering are looped without the necessity of using independent anchoring pieces.

For a detailed description of several forms of my invention, reference may be had to I the following specification and to the'acconl panying drawings, in which:

Figure 1 is aside elevation of a portion of a tire forming core, indicating-the manner of forming the carcass and attaching thesan'ie to the anchoring wires;

Fig. 2 is a'transverse sectional view of the core'ofFig 1 f 5 FigIB isa detail-viewof a. wire -coil removed "from-the core and-showing there-1 lationcfthe loops of the cord and wire as i wed from the inside, or in the direction of the arrow in Fig. 2-;

Fig his a fragmentary view;v of'another f f core; 1

" j Fig-'5 isa. sectional view of another form" Specification of Letters Patent.

Application filed July 25 .916. Serial No. 111,123..

- cal coils;

1 should have one-half the number. 0

the core. :VlZlienthei-coilsof wire havve h'ee fixed in position, theplacing o'frthe;cords-- upon a coil' of wire it is1first doubled-upon;

Patented May 29,1917.

of core showing a different method of at-fl taching the bead wires; 4

-Fi-g. 6 is a figure similar to Fig. 3, but showing anchoring coil with greater num-; ber of helical turns; I r t Fig. 7 is a view illustrating a modified way of attaching the anchoring. bead wires to the coils; My Fig.8 illustrates another modified way of attaching the ends of the loops to-theheli- Fig. 9 is a sectional view ofthebead; of. a clencher tire. showing-one way of dispos 1., I ing the wire coil within the same Referring to the drawings, the numeral-1,. indicates a suitable core which may be made, as usual, of cast iron, or may he madev of I wood, if not intended to. serve as a form during vulcanization. This core is :prefer: ably provided with an internal rib 2 which, is adapted to have bolted on each side thereof'arc-shaped angle irons 8'forn'1ingbrack ets through which pass screws: 4 p These screws screw into substantially triangular rings 5 which a'realso segmental or are shaped so as to be easily, removable w'h'e it is desired tostrip the carcassjbeingmanu k factured from the core or form. The screws, 4 also provide the necessary-spacing-means to accurately locate "{the segmentalringsi; Said rings 5 are each provided with ase ries of laterally extending pinsjdwhich, serve to accurately locate the strands .0115 cords of the tire carcass during the inanufacture or building of'the tire. :These parts: constitute the main eIe'men-tsQusedinform ing the tire carcass.

In the 'forming of {anchor-ing, means, shown in Figs. 1 and 2,11woihelifialTendlesg wire coils are located just withinathezpins where .they may be retainedZtemporariIy any suitable means; These helical coijls5 ;i

volutions 1 as there; are pins- ,on each? side of the. tire carcass maytbe. proceeded with One endofthe cordis anchored in; anyisuit ahle wayand the looping, of the cords pro ceed'ed withrto .fOI'm-f the: first :layer,;- a's indi ca-ted-zby the numeral 7 .l. oplaci--,, the cord itself and the bight slipped over one oitha flf shown at 12 inv Fig. 2.

convolutions, such as at 8. The cord is again looped or doubled'uponitself and the bight placed over a convolution of the opposite wire coil, asindicated at 9. When the cord is pulled tightly about the core-the bights will be slightly separated and drawn upward on the inside of the coils until they assume positions s'hownin Figs. 2 and 3.

It should be noted that when the bights of the cords are placed'over the coils, the- When the inner layer of cords has been completely placed in. position about the entire surface of the core, thelast run'will come into position near the first end which was temporarily anchored in position. The two ends may then be tied together, or the same cord continued without cutting so that the second layer of cords is formed in a manner similar to the first except that the angle of the cords is preferably madeo pm site to that of the first as regards the axis of the tire. This will come into position on .the wire coils as indicated at and 11, and depending upon the thickness "of thecords, will be drawn up to a point slightly removed from the bights of the first layer. of

cords, as indicated in Figs. 2' and 3. The sides or runs of the loops are also placed between the adjacent pins 6 was to aocu rately locate the loops.

a It is obvious that the cords may be previously impregnated with, rubber compound before looping over the wire coils, or may be impregnated after having been placed in position. I prefer to impregnate them previous to placing them in position as the adhesiveness of the rubber tends-to hold them temporarily in position. After the two layers of cords have been completely wound or loopedfover the wire-coils, the i'nextensible bead wires indicated by the numeral 12 are placed in position. These are preferably passed in 'succe'ssive turns through the unoccupied portion of the wire coils so that they lie substantially at the bottoms of the convolutions. They may be bound together in;any suitable way so as to form the inexpansible bead cores forfthe tire carcass and will assume a form substantially that In Fig. 6 I have shown a modified form of helical wire coils in which the number of convolutions are equal to the number of pins. In this form the bights or loops of the cord oflthe firstlayerare passed over every other: convolution of the wire and :when the second layer of cords is placed naaaiae tion in whichthe bead wires 13 are passed.

through the second set of helical coils indicated at" ld, which coils are intermes'hed with the coils of the first This form is of particular advantage where the space left-after loopihg the cords in position, as in Fig. 2, is not'suficient to easilyaccominodate the bead wires, or where. it is found necessary to use smaller sized coils, and will 'accommodateboth the cords and the bead wires In Fig. 11 have. indicated a'form of core which may be used in the'same manner as that shown-in Figs. 1 and 2,-but'is intended particularly for. use where the. carcass is vulcanized or cured on a separate core from that on which'it is built. The core 15 in Fig. 4 may be made of .wood'or any mate-v rial desired. It therefore vmay be made lighter than if made of cast iron, as are the usual cores for vulcanizing tire carcasses.

. The form of core shown in-Fig. 2' when made of cast'iron may be used for-vulcanizing or forming the tire carcass without removing the core. In which case it isonly necessary' 'to withdraw the spacing screws 1 and the bolts which retainthe angle pieces The bead-forming rings maythen he clamped or bolted into position in the place 'ofithe angle irons-3, or'the core'placed in a closed'mold to form the usual clencheredges or the inextensiblestraight edges pf the .Dunlop tire.

In Fig.5 Ihave-illustrated a modified form of core-forbuilding core tires' In this form" the plate 16 carries pins 17 in amanner similar to that illustrated in'Fig.

4'. 'Anannular ring 18-. is then located outside of the central 'r'ing'lfi by means of suit ablespacing screwsw19, or similar devices. In building the'tire carcass in this instants, the helical coils 20 are located on topoi the pins 17 instead of underneath the same, as in Figs. 2 and 4.. Instead of looping the bi'ghts of thecords over the convolutions of the coils, the cords of the first layer 21 are placed so that their bights' Passover the pins 1'? and also include cheer the convolutions of the coil 20. The single wire 22 is then passed inside of the cords 21 where it is held temporarily in position- The sec ond layer of cords 23 is then placed in p0- sition the bigh'tsextending over the pins 17, each including one of the convolutions of the coil 20. A second wire 24 is then passed between the outersides of the coil 20 and the cords. 23. Il-he numeral indicates one of the strands oi? the bead wires in position between the respective 100 s of the cords 2 1- and 23. The bights or oops of the cords are then removed born the instead of both engaging the same side, as indicated in Figs. 2 and 4:.

It will lee-apparent that the coils need not necessarily be placed in the margins of the tire casing in their helical form but may be bent or compressed to conform to' any desired shape corresponding to the size and shape of the bead or edge portions of the tire, as illustrated for example in Fig. 9. Sheet rubber stock may be placed upon the core before the first series of cords is laid and also may be placed outside the first layer of cords before the second is laid.

Various other arrangements for assembling the wire coils and cords of the tire carcass may be devised by those skilled in the art, without departing from the spirit and scope of my invention, and I do not wish to be understood as being limited to the particular arrangements illustrated.

Having described these forms of my invention what I claim and desire to protect by Letters Patent is:

'1. An anchorage for cords or strands of a tire carcass, comprising successive turns of helical coils over which the cords of said tire are looped.

2. An anchorage for cords or strands of cord tires, comprising successive turns of an endless helical coil over Which'the cords of'said tire are looped, and means for preventing radial expansion of said helical coil.

3. An anchorage for cords or strands of a tire carcass, comprising successive turns of endless helical coils over which thecords of said tire are looped, and inexpansible cord or cable passing through said loops for preventing radial expansion of said helical coils.

Signed at Jersey City, New Jersey, this 10th day of July, 1916.

BENJAMIN L. STOWE. 

